This story was written by Staci D. Kramer.Another senior executive departure from Yahoo (NSDQ: YHOO)Toby Coppel is leaving after 18 months as EVP and MD for Europe and Canada, Kara reports. Speculation may continue over Yang's successor but a replacement for Coppel was announced at the same timeRich Riley, now SVP of Yahoo Europe's Advertiser & Publisher Group. Coppel, who oversaw Yahoo Europe's exodus from London to Switzerland in March, will remain in his post until the end of Q109. He tells Kara that in his tenure, as well as stealing display ad market share from MSN and AOL (NYSE: TWX) in almost every European market, Yahoo's Canadian business has grown by 50 percent this year. But like everybody else Yahoo still trails in Google's wake in that marketmeaning that Coppel has had to make some big cuts this year to keep up, including selling price comparison site Kelkoo. AllThingsD also has the full internal memo from Yahoo President Sue Decker on Coppel's departure and the company's moves in Europe and Canada.